In the superposition image, an analysis region is determined.
在叠加图像中，确定分析区域。
A real optical superposition image was formed by dark-adapted crystalline cones for an object at different distances and its size decreased as the object distance increased.
经过暗适应的晶体柱可以对不同物距的目标形成清晰的正重叠像，像的大小随物距的增大而减小；
Thus, we propose that the blend of a full-color image can be viewed as superposition of two complementary gray - level transformation images.
这样，可将图像的合成看作两幅图像互补的灰度变换的叠加。
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